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Huawei Certified Internetwork Expert-Transmission Sample Questions:

1. A path is a transmission entity, which is connected by a pair of "one-way paths" that can simultaneously transmit information in opposite directions between their respective outputs and inputs.

A) FALSE
B) TRUE

2. In the test item of IEEE 1588V2 time protection function, what is wrong?

A) On the OptiX OSN 8800, the active/standby status of the clock board and cross-connect board are related to each other. During the switching test, it is recommended to switch only the cross-connect board or clock board.
B) To test the long-term stability of the time performance in the PTP synchronization mode, the output time performance should be within ±1us.
C) On the OptiX OSN 6800, the active/standby status of the clock board and cross-connect board are related to each other. During the switching test, it is recommended to switch only the cross-connect board or clock board.
D) Long-term jitter test in physical layer synchronization mode, using a time analyzer with GPS receiver to observe at the end node for more than 8 hours, and the test output time performance should be within ±1us.

3. When the SDH device configures the Ethernet layer 2 switching service, the switch forwards data frames based on the MAC address table, and the MAC address table is learned by the switch based on the source MAC address. The MAC address table of the common layer 2 switch is composed of the MAC address and the port of the switch. The mapping relationship established.

A) FALSE
B) TRUE

4. The scope of 1+1 protection in the OTU board is the optical fiber on the OCH path, that is, the optical fiber between the dual transmission of the source OTU single board and the selective receiving of the sink OTU single board. Cannot protect OTU board

A) FALSE
B) TRUE

5. #1 and #2 are OTM network elements, point-to-point chain services, 1 channel, OAU light emission +4dbm at station A, -35dbm light at the SC2 board at station #2, -30dbm for the OBU board, and -30dbm for the OTU single board. There is no light on the board, what is the most likely cause of the failure?

A) #2 site OTU board failure
B) #1/#2 line attenuation is too large
C) #2 site optical amplifier board failure
D) Originating OTU board failure

Solutions: